body {
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
}
h1 {
    text-align: center;
    margin-top: 50px;
}
form {
    width: 30%;
    margin: 50px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}
input[type="file"] {
    display: block;
    margin: 20px 0;
}
input[type="submit"] {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
input[type="submit"]:hover {
    background-color: #3071a9;
}